Delete All Appointments From Outlook Calendar?

I've got an HTML file that has a table in it. The table is some kind of a planboard. It contains the amount of planned hours for an employee for a customer on day x over a whole year. Our guys need it in their outlook schedules.Here is what i've built so far- Form to set parameters (select starttime, select input html file, alerting on or off)- Function that deletes all appointments within a set time frame that have a subject that starts with "project: "- Class that extracts all appointments from html and transforms them into outlook appointmentsEverything works peachy! -Except deleting appointments. I'm stuck! I've tried making a selection of appointments between two dates, i've tried looking for appointments on all days between to dates. It does not delete all items, just some of them. Of the23 occurences it should delete, it only deletes 12 OR 13 at random.